So sn 2B023237 250 Verado lower unit. The prop shaft has grooves where the seals contact it. It did not leak but did chunck the pinion and forward gear. I am wanting to repair it as a spare. Does Mercury or aftermarket make a sleeve that could go over these grooves for a fresh surface? We used to do it to car engines wher front or rear seals had done the same thing. If I have to replace the shaft then it won't be feasable to repair. IMG_20230122_122805[1].jpgIMG_20230122_121919[1].jpg